C0003

TCS Control Channel B Valve 1

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

The TCS/ABS indicator on the dashboard is on
Reduced effectiveness of the traction control system
Unstable ABS operation

Causes

TCS valve stuck
Open or short circuit in wiring harness
Valve solenoid malfunction
Problems with the ABS/TCS control module
Brake fluid leak

How to Fix

Check TCS valve harness and connectors
Check valve solenoid resistance
Check valve operation using a diagnostic scanner
Replace faulty valve or solenoid
Check the level and condition of the brake fluid

Related codes

C0001 C0002 C0004 C1210